<template>
  <el-container class="el-container">
    <!--   头部区   -->
    <el-header class="el-header">
      <div>
        <img src="../assets/heima.jpg" class="headimg" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--   页面主体区域   -->
    <el-container>
      <!--   侧边栏   -->
      <el-aside :width="is_collapse ? '64px' : '200px'" class="el-aside">
        <div class="tag_space" @click="isCollapse">|||</div>
        <!--   侧边栏菜单区   -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#ffd04b" :unique-opened="true" :collapse="is_collapse" :collapse-transition="false" router
          :default-active="activePath">
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
            <!--     一级菜单模板区域       -->
            <template slot="title">
              <!--     图标         -->
              <i :class="iconProject[item.id]"></i>
              <!--     文本         -->
              <span>{{ item.authName }}</span>
            </template>
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
                          @click="defaultActive('/'+subItem.path)">
              <!--     图标         -->
              <i class="el-icon-menu"></i>
              <!--     文本         -->
              <span>{{ subItem.authName }}</span>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--    右侧内容主体    -->
      <el-main class="el-main">
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      menuList: [],
      iconProject: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      is_collapse: false,
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$message.success('退出成功')
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg())
      this.menuList = res.data
    },
    // 是否折叠导航
    isCollapse () {
      this.is_collapse = !this.is_collapse
    },
    // 保存链接激活状态（高亮）
    defaultActive (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.el-container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;

  > div {
    display: flex;
    align-items: center;
    width: 20%;

    span {
      margin-left: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;

  .el-menu {
    border-right: 0
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont {
  margin-right: 5px;
}

.tag_space {
  line-height: 24px;
  text-align: center;
  font-size: 10px;
  color: #ffffff;
  background-color: #2b4b6b;
  letter-spacing: 2px;
}

.headimg{
  margin-left: 6%;
  width: 50px;
  height: 50px;
  border-radius: 50px;
}
</style>
